An Errors method argument is expected to appear immediately after
the model attribute in the method signature. It is resolved by expecting the
last two attributes added to the model to be the model attribute and its
BindingResult.

Resolves a method parameter into an argument value from a given request.
A ModelAndViewContainer provides access to the model for the
request. A WebDataBinderFactory provides a way to create
a WebDataBinder instance when needed for data binding and
type conversion purposes.